Whilst I agree that the EmDrive probably doesn’t work and is likely just an experimental error, dude, I have to say, maybe it’s time to chill a bit…
Charlatans? No. No-one is knowingly lying here, and that kind attitude is highly corrosive to science and the public respect for science. When people, esp. scientists are vitriolic about this stuff, they just end up looking like idiots - even if they turn out to be right, it damages them.
Don’t call people “charlatans” unless they actually are. People who are wrong, people who have stupid or bad theories. They are not charlatans. Period. Idiots? Maybe. Not charlatans.
All the stuff about “death stars” is just silly business and you don’t really get to call stuff “quack” if you’re genuinely leaping to that. C’mon dude, you can do better. Now you’re just looking silly.
(Even in the extremely unlikely even that it isn’t an experimental error, I would bet that the efficiency does actually eventually decrease - all the “violates the conservation of momentum” etc. stuff relies on the assumption that efficiency never decreases)
EDIT - You want some real charlatans, people who know shit isn’t going to work, or not work well, but are demanding huge sums of cash to “test” stuff, you might want to look at fusion power. It’s not the wacky, cheap, perpetual-motion stuff that’s dangerous. It’s the big, fat, expensive projects which are fucking doomed because they’re fundamentally dumb and everyone working on them knows that they are. Even the fucking SLS is more of a genuinely dodgy project than this, from a fiscal or moral perspective.